Q. Which is the nitrogen base absent in DNA?

A
Adenine
B
Thymine
C
Uracil
D
Guanine
Solution:

DNA contains deoxyribose sugar. DNA has four kinds of nitrogen bases, namely adenine, thymine, guanine and cytosine.

RNA is another nucleic acid like DNA. RNA is also formed of nucleotides. Ribose sugar is present in RNA. In RNA, the nitrogen base uracil is seen instead of thymine.

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